Search found 16501 matches

by Harold_V
Mon Jul 16, 2018 3:50 pm
Forum: General Discussion
Topic: TGP for hydraulics
Replies: 21
Views: 282

Re: TGP for hydraulics

That’s why I was asking about the TPG because it said it COULD be hardened which to me meant it wasn’t. Hardening, unless you have the ability to deal with the resulting scale and change in diameter, isn't a good idea. Even with a controlled atmosphere furnace, the heat treat process will demand fu...
by Harold_V
Mon Jul 16, 2018 1:58 am
Forum: Live Steam Marketplace
Topic: Allen Models - running boards back in stock
Replies: 17
Views: 547

Re: Allen Models - running boards back in stock

Harold said: "One knows, at a glance, if a dimension is critical, or not, and if so, how critical." That may not be true for the beginning machinist. I admit that the changes to current acceptable practice is a good thing, but what I said is true, doesn't matter the level of competence of the machi...
by Harold_V
Sun Jul 15, 2018 4:08 pm
Forum: Live Steam Marketplace
Topic: Allen Models - running boards back in stock
Replies: 17
Views: 547

Re: Allen Models - running boards back in stock

I have seen beautiful locos literally seize up because of too tight a tolerance for the temperature changes. It is not the fault of the machining. but the fitting. Correct. Or, said another way, it's an engineering problem, and not related to tolerance, a term that is vastly misunderstood. Tight to...
by Harold_V
Sun Jul 15, 2018 1:58 am
Forum: Lathes
Topic: Monarch lathe
Replies: 33
Views: 699

Re: Monarch lathe

I like the comparison to a Duesenberg. The car of my dreams. :-)

H
by Harold_V
Sun Jul 15, 2018 1:49 am
Forum: Live Steam Marketplace
Topic: Allen Models - running boards back in stock
Replies: 17
Views: 547

Re: Allen Models - running boards back in stock

Steve, The point is there are dimensions that simply aren't critical. Those are the ones that remain as a fraction. Like the overall length of a casting, as an example. If you dimension such an item with a three place decimal, you either must accept scrap (rarely will a casting be held to .005" tole...
by Harold_V
Sat Jul 14, 2018 3:56 pm
Forum: Live Steam Marketplace
Topic: Allen Models - running boards back in stock
Replies: 17
Views: 547

Re: Allen Models - running boards back in stock

Not wanting to make decisions for you, but you may wish to reconsider replacing fractions with decimals. All depends on how you tolerance your drawings, of course. Where I was trained, basic tolerances were established by how dimensions were displayed. Fractions automatically were assumed to be ±1/6...
by Harold_V
Fri Jul 13, 2018 3:12 pm
Forum: Grand Scale Railroading
Topic: Arborway, T.T. and NW Closed
Replies: 15
Views: 2171

Re: Arborway, T.T. and NW Closed

Check out https://woodsvalleyfarm.com/ for more information. Wow, that IS a spectacular place! No, I will not be asking the price but I will continue working on a national railway preservation society with an endowment to purchase and preserve such things. As I said on a post on another forum 'what...
by Harold_V
Fri Jul 13, 2018 3:29 am
Forum: Lathes
Topic: Monarch lathe
Replies: 33
Views: 699

Re: Monarch lathe

Fact is, any of the more modern Monarch lathes would provide a level of performance that is hard to beat. The machines built during WW II were geared quite low (not intended for use with carbide), and are also excellent machines, just too slow for comfortable operation. We had what I believe to be a...
by Harold_V
Fri Jul 13, 2018 1:58 am
Forum: General Discussion
Topic: Gem DTI
Replies: 4
Views: 194

Re: Gem DTI

I've got one of each. I don't see any significant difference. If that's the case, my opinion of the Gem is not good. I've owned a Last Word since 1958. It was returned to Starrett for repair when it was not reliable, but it quickly returned to that same condition. The only real use it has now is in...
by Harold_V
Fri Jul 13, 2018 1:45 am
Forum: Lathes
Topic: Monarch lathe
Replies: 33
Views: 699

Re: Monarch lathe

I'm at a loss to understand anyone's romance with keeping such a machine original, depending on the reason it is owned. I am not a tool collector. I own the machines I do because they do work I hope to accomplish. If I had an EE and had to make a change in the drive system, I'd certainly do so, espe...
by Harold_V
Thu Jul 12, 2018 4:00 pm
Forum: Live Steam
Topic: 1" U in 1/4" copper tube
Replies: 22
Views: 876

Re: 1" U in 1/4" copper tube

gwrdriver wrote:
Thu Jul 12, 2018 7:44 am
Here you go . . . https://www.google.com/search?q=making+ ... #kpvalbx=1
The pertinent part begins at 3:18.
Thanks for that. It's something I'd never seen, and answered a lot of questions.

H
by Harold_V
Thu Jul 12, 2018 3:50 pm
Forum: Riding Scale Railroading
Topic: Your RR grading methods??
Replies: 43
Views: 3294

Re: Your RR grading methods??

The taper of the wheel is what helps keep the device running on center, and also provides the ability of wheels to turn on curves, whereby one wheel must move farther than the opposing wheel. I think I'd think long and hard before making that kind of change.

Just sayin' :wink:

H